from __future__ import print_function

import sys

V3K = False  #: Python3.5+
if sys.version_info[:2] > (3, 4,):
    V3K = True
    ISSTR = (str, bytes,)  # : string as unicode
    unicode = str  # @ReservedAssignment
elif sys.version_info[:2] > (2, 6,) and sys.version_info[:2][0] < 3:
    ISSTR = (str, unicode,)  # : string and unicode
else:
    raise Exception("Requires Python 2.7+, or 3.5+:" +
                    str(sys.version_info[:2]))

print()
print(sys.version_info)
print()

print("V3K       = " + str(V3K))
print("unicode   = " + str(unicode))
print("ISSTR     = " + str(ISSTR))

print()

mystring = "abc"
b0 = bytes(mystring.encode('ascii'))
u0 = unicode(b0, 'utf-8')  # result: abc
u1 = unicode(b0)  # result: b'abc'

print("b0: " + str(b0))
print("u0: " + str(u0))
print("u1: " + str(u1))
print("type(b0): " + str(type(b0)))
print("type(u0): " + str(type(u0)))
print("type(u1): " + str(type(u1)))
print("len(b0):  " + str(len(b0)))
print("len(u0):  " + str(len(u0)))
print("len(u1):  " + str(len(u1)))